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OpenCloudOS-Kernel
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Glauber Costa 3f13461939 memcg: decrement static keys at real destroy time 
We call the destroy function when a cgroup starts to be removed, such as
by a rmdir event.

However, because of our reference counters, some objects are still
inflight.  Right now, we are decrementing the static_keys at destroy()
time, meaning that if we get rid of the last static_key reference, some
objects will still have charges, but the code to properly uncharge them
won't be run.

This becomes a problem specially if it is ever enabled again, because now
new charges will be added to the staled charges making keeping it pretty
much impossible.

We just need to be careful with the static branch activation: since there
is no particular preferred order of their activation, we need to make sure
that we only start using it after all call sites are active.  This is
achieved by having a per-memcg flag that is only updated after
static_key_slow_inc() returns.  At this time, we are sure all sites are
active.

This is made per-memcg, not global, for a reason: it also has the effect
of making socket accounting more consistent.  The first memcg to be
limited will trigger static_key() activation, therefore, accounting.  But
all the others will then be accounted no matter what.  After this patch,
only limited memcgs will have its sockets accounted.

[akpm@linux-foundation.org: move enum sock_flag_bits into sock.h,
                            document enum sock_flag_bits,
                            convert memcg_proto_active() and memcg_proto_activated() to test_bit(),
                            redo tcp_update_limit() comment to 80 cols]
Signed-off-by: Glauber Costa <glommer@parallels.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Li Zefan <lizefan@huawei.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Acked-by: David Miller <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2012-05-29 16:22:28 -07:00
..
9p 9p: Reduce object size with CONFIG_NET_9P_DEBUG 2012-01-05 10:51:44 -06:00
bluetooth Bluetooth: Create flags for bt_sk() 2012-05-16 16:14:17 -03:00
caif caif-hsi: robust frame aggregation for HSI 2012-04-13 11:37:36 -04:00
irda Fix common misspellings 2011-03-31 11:26:23 -03:00
iucv af_iucv: add shutdown for HS transport 2012-03-07 22:52:24 -08:00
netfilter netfilter: nf_conntrack: use this_cpu_inc() 2012-05-08 19:36:33 +02:00
netns netfilter: nf_ct_helper: allow to disable automatic helper assignment 2012-05-08 19:35:18 +02:00
nfc NFC: HCI drivers don't have to keep track of polling state 2012-05-15 17:31:22 -04:00
phonet net: dont hold rtnl mutex during netlink dump callbacks 2011-05-02 15:26:28 -07:00
sctp Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-05-16 22:17:37 -04:00
tc_act net/sched: add ACT_CSUM action to update packets checksums 2010-08-20 01:42:59 -07:00
act_api.h net: sched: constify tcf_proto and tc_action 2011-07-06 02:52:16 -07:00
addrconf.h ipv6: bool/const conversions phase2 2012-05-19 01:08:16 -04:00
af_ieee802154.h
…
af_rxrpc.h net: Remove __KERNEL__ cpp checks from include/net 2011-04-24 10:54:56 -07:00
af_unix.h net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
ah.h ipsec: update MAX_AH_AUTH_LEN to support sha512 2011-01-13 21:48:25 -08:00
arp.h ipv4: Eliminate spurious argument to __ipv4_neigh_lookup 2012-02-15 17:48:35 -05:00
atmclip.h atm: clip: Use device neigh support on top of "arp_tbl". 2011-11-30 18:51:03 -05:00
ax25.h net ax25: Fix the build when sysctl support is disabled. 2012-04-23 22:14:47 -04:00
ax88796.h
…
cfg80211-wext.h cfg80211: remove unused wext handler exports 2011-08-08 14:26:29 -04:00
cfg80211.h cfg80211: fix cfg80211_can_beacon_sec_chan prototype 2012-05-16 13:08:15 -04:00
checksum.h
…
cipso_ipv4.h doc: Update the email address for Paul Moore in various source files 2011-08-01 17:58:33 -07:00
cls_cgroup.h Merge commit 'v2.6.36-rc7' into core/rcu 2010-10-07 09:43:45 +02:00
codel.h fq_codel: should use qdisc backlog as threshold 2012-05-16 15:30:26 -04:00
compat.h net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
datalink.h
…
dcbevent.h dcb: Add stub routines for !CONFIG_DCB 2011-10-06 15:49:51 -04:00
dcbnl.h net/dcb: Add an optional max rate attribute 2012-04-05 05:08:04 -04:00
dn.h net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
dn_dev.h decnet: RCU conversion and get rid of dev_base_lock 2010-11-08 13:50:08 -08:00
dn_fib.h net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
dn_neigh.h
…
dn_nsp.h net: use __packed annotation 2010-06-03 03:21:52 -07:00
dn_route.h net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
dsa.h dsa: Include linux/if_ether.h to fix build error 2011-12-01 11:41:06 -05:00
dsfield.h
…
dst.h set fake_rtable's dst to NULL to avoid kernel Oops 2012-04-24 00:16:24 -04:00
dst_ops.h net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
esp.h
…
ethoc.h
…
fib_rules.h fib_rules: __rcu annotates ctarget 2010-10-27 11:37:32 -07:00
flow.h ipv4: reset flowi parameters on route connect 2012-02-04 19:29:48 -05:00
flow_keys.h flow_dissector: use a 64bit load/store 2011-11-29 13:17:03 -05:00
garp.h garp: remove last synchronize_rcu() call 2011-05-12 17:46:56 -04:00
gen_stats.h Fix common misspellings 2011-03-31 11:26:23 -03:00
genetlink.h net: Deinline __nlmsg_put and genlmsg_put. -7k code on i386 defconfig. 2012-01-30 15:22:06 -05:00
gre.h PPTP: PPP over IPv4 (Point-to-Point Tunneling Protocol) 2010-08-21 23:05:39 -07:00
icmp.h net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
ieee80211_radiotap.h wireless: move ieee80211chan2mhz macro 2011-11-11 12:32:50 -05:00
ieee802154.h 6LoWPAN: add fragmentation support 2011-11-14 00:19:42 -05:00
ieee802154_netdev.h mac802154: declare reduced mlme operations 2012-05-16 15:16:56 -04:00
if_inet6.h net: delete all instances of special processing for token ring 2012-05-15 20:14:35 -04:00
inet6_connection_sock.h tcp: bind() use stronger condition for bind_conflict 2012-04-14 15:28:55 -04:00
inet6_hashtables.h net: use IS_ENABLED(CONFIG_IPV6) 2011-12-11 18:25:16 -05:00
inet_common.h inet, inet6: make tcp_sendmsg() and tcp_sendpage() through inet_sendmsg() and inet_sendpage() 2010-07-12 20:21:46 -07:00
inet_connection_sock.h ipv6: RTAX_FEATURE_ALLFRAG causes inefficient TCP segment sizing 2012-04-27 00:03:34 -04:00
inet_ecn.h inet: add rfc 3168 extract in front of INET_ECN_encapsulate() 2011-10-22 01:25:23 -04:00
inet_frag.h ip_frag: struct inet_frags match() method returns a bool 2012-05-18 01:40:27 -04:00
inet_hashtables.h atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
inet_sock.h net: implement IP_RECVTOS for IP_PKTOPTIONS 2012-02-13 00:46:41 -05:00
inet_timewait_sock.h inet: remove rcu protection on tw_net 2011-12-14 13:34:55 -05:00
inetpeer.h route: Remove redirect_genid 2012-03-08 00:30:32 -08:00
ip.h net: delete all instances of special processing for token ring 2012-05-15 20:14:35 -04:00
ip6_checksum.h
…
ip6_fib.h ipv6: clean up rt6_clean_expires 2012-04-17 22:31:59 -04:00
ip6_route.h ipv6: bool/const conversions phase2 2012-05-19 01:08:16 -04:00
ip6_tunnel.h tunnels: add _rcu annotations 2010-10-25 13:09:45 -07:00
ip_fib.h net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
ip_vs.h ipvs: add support for sync threads 2012-05-08 19:40:33 +02:00
ipcomp.h
…
ipconfig.h
…
ipip.h tunnel: implement 64 bits statistics 2012-04-14 14:47:05 -04:00
ipv6.h ipv6: bool/const conversions phase2 2012-05-19 01:08:16 -04:00
ipx.h net: Remove __KERNEL__ cpp checks from include/net 2011-04-24 10:54:56 -07:00
iw_handler.h Fix common misspellings 2011-03-31 11:26:23 -03:00
lapb.h lapb: Neaten debugging 2012-05-17 18:45:20 -04:00
lib80211.h include: replace linux/module.h with "struct module" wherever possible 2011-10-31 19:32:32 -04:00
llc.h atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
llc_c_ac.h
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llc_c_ev.h net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
llc_c_st.h
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llc_conn.h
…
llc_if.h
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llc_pdu.h net: delete all instances of special processing for token ring 2012-05-15 20:14:35 -04:00
llc_s_ac.h
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llc_s_ev.h
…
llc_s_st.h
…
llc_sap.h
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mac80211.h mac80211: (selectively) add HT details in radiotap 2012-05-16 12:46:38 -04:00
mac802154.h mac802154: RX data path 2012-05-16 15:16:44 -04:00
mip6.h net: use __packed annotation 2010-06-03 03:21:52 -07:00
mld.h
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ndisc.h Treat ND option 31 as userland (DNSSL support) 2012-04-12 15:56:57 -04:00
neighbour.h net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
net_namespace.h net sysctl: Add place holder functions for when sysctl support is compiled out of the kernel. 2012-04-23 19:24:28 -04:00
net_ratelimit.h net: Kill ratelimit.h dependency in linux/net.h 2011-05-27 13:41:33 -04:00
netdma.h
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netevent.h net: Remove __KERNEL__ cpp checks from include/net 2011-04-24 10:54:56 -07:00
netlabel.h doc: Update the email address for Paul Moore in various source files 2011-08-01 17:58:33 -07:00
netlink.h netlink: Delete all NLA_PUT*() macros. 2012-04-02 04:33:45 -04:00
netprio_cgroup.h netprio_cgroup: fix wrong memory access when NETPRIO_CGROUP=m 2012-02-10 15:08:57 -05:00
netrom.h
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nexthop.h
…
nl802154.h
…
p8022.h
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ping.h net: ping: fix build failure 2011-05-17 14:16:58 -04:00
pkt_cls.h net: Fix range checks in tcf_valid_offset(). 2010-12-21 12:43:16 -08:00
pkt_sched.h net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
protocol.h net: use IS_ENABLED(CONFIG_IPV6) 2011-12-11 18:25:16 -05:00
psnap.h
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raw.h include/net/raw.h: Convert raw_seq_private macro to inline 2010-09-08 13:42:22 -07:00
rawv6.h ipv6: bool/const conversions phase2 2012-05-19 01:08:16 -04:00
red.h net_sched: red: Make minor corrections to comments 2012-04-16 23:53:11 -04:00
regulatory.h cfg80211: pass DFS region to drivers through reg_notifier() 2011-11-21 16:20:41 -05:00
request_sock.h tcp: Change possible SYN flooding messages 2011-09-15 14:49:43 -04:00
rose.h rose: Add length checks to CALL_REQUEST parsing 2011-03-27 17:59:04 -07:00
route.h net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
rtnetlink.h rtnetlink: ops->get_tx_queue() cannot take a const 'tb'. 2012-04-13 14:21:04 -04:00
sch_generic.h net: Make qdisc_skb_cb upper size bound explicit. 2012-02-09 13:50:34 -05:00
scm.h af_unix: dont send SCM_CREDENTIALS by default 2011-09-28 13:29:50 -04:00
secure_seq.h tcp: add const qualifiers where possible 2011-10-21 05:22:42 -04:00
slhc_vj.h
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snmp.h Merge branch 'for-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu 2012-01-09 13:08:28 -08:00
sock.h memcg: decrement static keys at real destroy time 2012-05-29 16:22:28 -07:00
stp.h
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tcp.h tcp: bool conversions 2012-05-17 14:59:59 -04:00
tcp_memcontrol.h cgroup: pass struct mem_cgroup instead of struct cgroup to socket memcg 2012-04-10 10:04:07 -07:00
tcp_states.h
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timewait_sock.h BUG: headers with BUG/BUG_ON etc. need linux/bug.h 2012-03-04 17:54:34 -05:00
transp_v6.h net: relax PKTINFO non local ipv6 udp xmit check 2011-08-30 17:39:01 -04:00
udp.h net/ipv6/udp: UDP encapsulation: introduce encap_rcv hook into IPv6 2012-04-28 22:21:51 -04:00
udplite.h net: ipv4: Standardize prefixes for message logging 2012-03-12 17:05:21 -07:00
wext.h
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wimax.h net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
wpan-phy.h mac802154: monitor device support 2012-05-16 15:17:08 -04:00
x25.h net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
x25device.h
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xfrm.h xfrm: Convert several xfrm policy match functions to bool. 2012-05-15 15:04:57 -04:00